agrément certificate 17/5466 leadax flashings

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Leadax BV

Vlijtweg 4

8191 JP Wapenveld

The Netherlands

Tel: +31 085 065 37 46 Agrément Certificate e-mail: [email protected] 17/5466 website: www.leadax.com Product Sheet 1

LEADAX FLASHINGS LEADAX

This Agrément Certificate Product Sheet(1) relates to

Leadax, a polyvinyl butyral reinforced material for use in

flashing applications on flat and pitched roofs.

(1) Hereinafter referred to as ‘Certificate’.

CERTIFICATION INCLUDES:

• factors relating to compliance with Building Regulations

where applicable

• factors relating to additional non-regulatory information

where applicable

• independently verified technical specification

• assessment criteria and technical investigations

• design considerations

• installation guidance

• regular surveillance of production

• formal three-yearly review.

KEY FACTORS ASSESSED

Weathertightness — when used as part of a complete roof, the product will contribute to

resisting the passage of moisture into the interior of the building (see section 6).

Properties in relation to fire — the product, when used as part of a complete roof, will be unrestricted

under the national Building Regulations (see section 7).

Strength — the product has adequate strength to resist the loads associated with installation of the roof

(see section 8).

Durability — under normal service conditions, the product will have a service life of at least 20 years (see section 10).

The BBA has awarded this Certificate to the company named above for the product described herein. This product has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate.

On behalf of the British Board of Agrément

Date of Second issue: 23 October 2018

Originally certificated on 24 October 2017

John Albon – Head of Approvals Construction Products

Claire Curtis-Thomas Chief Executive

The BBA is a UKAS accredited certification body – Number 113. The schedule of the current scope of accreditation for product certification is available in pdf format via the UKAS link on the BBA website at www.bbacerts.co.uk Readers are advised to check the validity and latest issue number of this Agrément Certificate by either referring to the BBA website or contacting the BBA direct.

Any photographs are for illustrative purposes only, do not constitute advice and should not be relied upon.

British Board of Agrément Bucknalls Lane Watford Herts WD25 9BA

©2018

tel: 01923 665300

[email protected] www.bbacerts.co.uk

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Regulations

In the opinion of the BBA, Leadax, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to satisfying the relevant requirements of the following Building Regulations (the presence of a UK map indicates that the subject is related to the Building Regulations in the region or regions of the UK depicted):

The Building Regulations 2010 (England and Wales) (as amended)

Requirement: B4(2) External fire spread Comment: The product, when used as part of a complete roof, will not affect the fire rating of the

roof construction. See section 7 of this Certificate. Requirement: C2(b) Resistance to moisture Comment: The product will contribute to a roof satisfying this Requirement. See section 6 of this

Certificate. Regulation: 7 Materials and workmanship Comment: The product is acceptable. See section 10 and the Installation part of this Certificate.

The Building (Scotland) Regulations 2004 (as amended)

Regulation: 8(1) Durability, workmanship and fitness of materials Comment: The product can contribute to a construction satisfying the requirements of this

Regulation. See section 10 and the Installation part of this Certificate. Regulation: 9 Building standards applicable to construction Standard: 2.8 Spread from neighbouring buildings Comment: The product can be regarded as having a low vulnerability, with reference to clause

2.8.1(1)(2) of this Standard, and will not affect the fire rating of the roof construction. See section 7 of this Certificate.

Standard: 3.10 Precipitation Comment: The product will contribute to a roof satisfying clauses 3.10.1(1)(2), 3.10.7(1)(2) and

3.10.8(1)(2) of this Standard. See section 6 of this Certificate. Standard: 7.1(a) Statement of sustainability Comment: The product can contribute to meeting the relevant requirements of Regulation 9,

Standards 1 to 6 and therefore will contribute to a construction meeting a bronze level of sustainability as defined in this Standard.

Regulation: 12 Building standards applicable to conversions Comment: Comments in relation to the product under Regulation 9, Standards 1 to 6 also apply to

this Regulation, with reference to clause 0.12.1(1)(2) and Schedule 6(1)(2). (1) Technical Handbook (Domestic).

(2) Technical Handbook (Non-Domestic).

The Building Regulations (Northern Ireland) 2012 (as amended)

Regulation: 23(a)(i) Fitness of materials and workmanship Comment: (iii)(b)(i) The product is acceptable. See section 10 and the Installation part of this Certificate. Regulation: 28(b) Resistance to moisture and weather Comment: The product will contribute to a roof satisfying this Regulation. See section 6 of this

Certificate.

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Regulation: 36(b) External fire spread Comment: The product, when used as part of a complete roof, will not affect the fire rating of the

roof construction. See section 7 of this Certificate.

Construction (Design and Management) Regulations 2015 Construction (Design and Management) Regulations (Northern Ireland) 2016 Information in this Certificate may assist the client, designer (including Principal Designer) and contractor (including Principal Contractor) to address their obligations under these Regulations. See sections: 1 Description (1.2) and 11 General (11.2) of this Certificate.

Additional Information

NHBC Standards 2018 In the opinion of the BBA, Leadax, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to satisfying the relevant requirements in relation to NHBC Standards, Chapters 6.8 Fireplaces, chimneys and flues and 7.2 Pitched roofs.

Technical Specification

1 Description 1.1 Leadax is a polyvinyl butyral (PVB) based flashing material with an aluminium mesh reinforcement. 1.2 The flashing has a thickness of 3.0 mm with a weight per unit area of 3.85 kg·m-2 and is manufactured to the dimensions given in Table 1. The product is available in lead grey, black and terracotta colours.

Table 1 Product dimensions

Width (mm) Length (m) Roll weight (kg)

150 6 3.5 200 6 4.6 250 6 5.8 300 6 7.0 330 6 7.7 400 6 9.2 450 6 10.4 500 6 11.5 600 6 13.9 1000 6 23.1

1.3 The ancillary items for use with the product are:

• Leadax Sealant — for use in joints and sealing to the substrate

• Leadax Clips — for use in fixing into chased pointing joints

• Leadax Roller — for moulding the product and pressing down the seams

• Leadax Scissors — for cutting the product.

2 Manufacture 2.1 The product is manufactured by coating both sides of a reinforced aluminium mesh with extruded PVB compound. 2.2 As part of the assessment and ongoing surveillance of product quality, the BBA has:

• agreed with the manufacturer the quality control procedures and product testing to be undertaken

• assessed and agreed the quality control operated over batches of incoming materials

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• monitored the production process and verified that it is in accordance with the documented process

• evaluated the process for management of nonconformities

• checked that equipment has been properly tested and calibrated

• undertaken to carry out the above measures on a regular basis through a surveillance process, to verify that the specifications and quality control operated by the manufacturer are being maintained.

2.3 The management system of the manufacturer has been assessed and registered as meeting the requirements of BS EN ISO 9001 : 2015 by Kiwa Nederland B.V (Certificate KSC-K55806/03).

3 Delivery and site handling 3.1 The product is distributed sealed in plastic film on pallets marked with the size, a wrapper with installation

instructions and the BBA logo incorporating the number of this Certificate.

3.2 The product should be stored upright, on a smooth, clean, dry surface, under cover and protected from sunlight.

Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on Leadax.

Design Considerations

4 Use

Leadax, when used and installed in accordance with BS 5534 : 2014, BS 6229 : 2003, BS 8000-0 : 2014 and BS 8000-6 : 2013, is satisfactory for use in flashing applications such as abutments, stepped flashings, chimneys, dormers and in valleys to provide a weatherproof junction.

5 Practicability of installation The product can be installed readily by roofing contractors experienced with this type of product.

6 Weathertightness

Leadax, when incorporated into a roofing system designed and installed in accordance with conventional good practice, will adequately resist the passage of moisture to the interior of the building and so contribute to the roof satisfying the requirements of the national Building Regulations.

7 Properties in relation to fire

7.1 Samples of Leadax, when tested in accordance with BS 476-3 : 2004, achieved a C rating for surface spread of flame.

7.2 In the opinion of the BBA, the product therefore achieves an AC rating or low vulnerability as defined in the national Building Regulations.

8 Strength The product will resist the impacts associated with installation and use.

9 Maintenance There are no maintenance requirements, other than a regular visual check for damage.

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10 Durability

The product, when subjected to normal conditions of exposure and use, will have a service life of at least 20 years.

Installation

11 General 11.1 Leadax must be installed and fixed in accordance with this Certificate, the Certificate holder’s instructions and

the relevant recommendations of BS 5534 : 2014, BS 6229 : 2003, BS 8000-0 : 2014 and BS 8000-6 : 2013.

11.2 The product is worked the same way as lead flashing by bossing around shapes or folding as required, but

without the need for protective measures. It can be cut with a sharp knife or Leadax Scissors.

11.3 A minimum temperature of -20°C is required for cutting and folding. The product is more difficult to process at

temperatures below 5˚C.

12 Procedure 12.1 The product is fitted into the pointing gap by at least 30 mm and held in place with Leadax Fixing Clips. Lime

mortar should be applied into the pointing gap to ensure the joint remains waterproof.

12.2 When using the product in valleys, it should be fully supported on 19 mm boarding set between the rafters with a

4 mm overlay of plywood in the same manner as recommended when using lead flashing.

12.3 The product should cover upstands by at least 75 mm and be sealed to the substrate with a continuous bead of

Leadax Sealant. The height of the upstand should be at least 150 mm.

12.4 Overlap joints between the product (minimum 60 mm) can be hot-air welded or sealed using Leadax Sealant.

The recommended welding temperature is 350 to 400°C.

12.5 The Leadax Roller is used to press down the welded seams and mould the product to the area where it has been

applied.

13 Repair Damage to the product must be repaired prior to the installation of slates or tiles by patching and sealing the damaged

areas. Care must be taken to ensure that the watertightness of the roof is maintained.

Technical Investigations

14 Investigations 14.1 An assessment was made of existing data relating to:

• dimensional checks

• weight per unit area

• resistance to tear

• dimensional stability

• resistance to water penetration

• water vapour transmission

• effect of heat ageing

• resistance to UV ageing

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• effect of water exposure

• effect of exposure to milk of lime

• effect of exposure to bitumen

• effect of exposure to PVC

• resistance to impact (soft and hard substrates)

• resistance to static loading

• low temperature flexibility

• resistance to peel from support

• shear resistance of joints

• peel resistance of joints

• watertightness of joints.

14.2 The manufacturing process was evaluated, including the methods adopted for quality control, and details were obtained of the quality and composition of the materials used. 14.3 An assessment was made of results of a fire test in accordance with BS 476-3 : 2004.

Bibliography BS 476-3 : 2004 Fire tests on building materials and structures — Classification and method of test for external fire

exposure to roofs

BS 5534 : 2014 + A2 : 2018 Slating and tiling for pitched roofs and vertical cladding — Code of practice

BS 6229 : 2003 Flat roofs with continuously supported coverings — Code of practice

BS 8000-0 : 2014 Workmanship on building sites — Introduction and general principles

BS 8000-6 : 2013 Workmanship on building sites — Code of practice for slating and tiling of roofs and claddings

BS EN ISO 9001 : 2015 Quality management systems — Requirements

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Conditions of Certification

15 Conditions 15.1 This Certificate:

• relates only to the product/system that is named and described on the front page

• is issued only to the company, firm, organisation or person named on the front page – no other company, firm, organisation or person may hold or claim that this Certificate has been issued to them

• is valid only within the UK

• has to be read, considered and used as a whole document – it may be misleading and will be incomplete to be selective

• is copyright of the BBA

• is subject to English Law. 15.2 Publications, documents, specifications, legislation, regulations, standards and the like referenced in this Certificate are those that were current and/or deemed relevant by the BBA at the date of issue or reissue of this Certificate. 15.3 This Certificate will remain valid for an unlimited period provided that the product/system and its manufacture and/or fabrication, including all related and relevant parts and processes thereof:

• are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA

• continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine

• are reviewed by the BBA as and when it considers appropriate. 15.4 The BBA has used due skill, care and diligence in preparing this Certificate, but no warranty is provided. 15.5 In issuing this Certificate the BBA is not responsible and is excluded from any liability to any company, firm, organisation or person, for any matters arising directly or indirectly from:

• the presence or absence of any patent, intellectual property or similar rights subsisting in the product/system or any other product/system

• the right of the Certificate holder to manufacture, supply, install, maintain or market the product/system

• actual installations of the product/system, including their nature, design, methods, performance, workmanship and maintenance

• any works and constructions in which the product/system is installed, including their nature, design, methods, performance, workmanship and maintenance

• any loss or damage, including personal injury, howsoever caused by the product/system, including its manufacture, supply, installation, use, maintenance and removal

• any claims by the manufacturer relating to CE marking. 15.6 Any information relating to the manufacture, supply, installation, use, maintenance and removal of this product/system which is contained or referred to in this Certificate is the minimum required to be met when the product/system is manufactured, supplied, installed, used, maintained and removed. It does not purport in any way to restate the requirements of the Health and Safety at Work etc. Act 1974, or of any other statutory, common law or other duty which may exist at the date of issue or reissue of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care.

British Board of Agrément Bucknalls Lane Watford Herts WD25 9BA

©2018

tel: 01923 665300

[email protected] www.bbacerts.co.uk

agrément certificate 17/5466 leadax flashings

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